210612066 has 64 divisors (see below), whose sum is σ = 497134848. Its totient is φ = 58226688.

The previous prime is 210612053. The next prime is 210612079. The reversal of 210612066 is 660216012.

It is an interprime number because it is at equal distance from previous prime (210612053) and next prime (210612079).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 486186 + ... + 486618.

It is an arithmetic number, because the mean of its divisors is an integer number (7767732).

Almost surely, 2^210612066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210612066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248567424).

210612066 is an abundant number, since it is smaller than the sum of its proper divisors (286522782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210612066 is a wasteful number, since it uses less digits than its factorization.

210612066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 210612066 is about 14512.4796640684. The cubic root of 210612066 is about 594.9691069806.

Adding to 210612066 its reverse (660216012), we get a palindrome (870828078).

The spelling of 210612066 in words is "two hundred ten million, six hundred twelve thousand, sixty-six".